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iOS view life circle code example
@implementation
- (void)setup {
// Non-UI initialization goes here. It will only ever be called once.
}
- (id)initWithNibName:(NSString *)nibName bundle:(NSString *)bundle {
if ((self = [super initWithNibName:nibName bundle:bundle])) {
[self setup];
}
}
- (void)awakeFromNib {
[self setup];
}
- (void)viewDidLoad {
// Any UI-related configuration goes here. It may be called multiple times,
// but each time it is called, `self.view` will be freshly loaded from the nib
// file.
}
- (void)viewDidUnload {
[super viewDidUnload];
// Set all IBOutlets to `nil` here.
// Drop any lazy-load data that you didn't drop in viewWillDisappear:
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
// Most data loading should go here to make sure the view matches the model
// every time it's put on the screen. This is also a good place to observe
// notifications and KVO, and to setup timers.
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
// Unregister from notifications and KVO here (balancing viewWillAppear:).
// Stop timers.
// This is a good place to tidy things up, free memory, save things to
// the model, etc.
}
- (void)dealloc {
// standard release stuff if non-ARC
[[NSNotificationCenter defaultCenter] removeObvserver:self]; // If you observed anything
// Stop timers.
// Don't unregister KVO here. Observe and remove KVO in viewWill(Dis)appear.
}
@end
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